Otherwise, it is built directly on top of the subgrade.

Check to make sure that the subgrade is level.

It is designed primarily to reduce the stress on the subgrade.

Its role is to spread the load evenly over the subgrade.

The next step is preparation of the subgrade, the earth beneath the slab.

So a subgrade of A would be very strong, like concrete-stabilized clay.

This process is known as "subgrade formation" or "reduction to level".

When the contractor prepared the subgrade for the terrace, he removed the moss.

Ensure the subgrade is well compacted before beginning tube installation.

Weakness of the subgrade and drainage deficiencies also lead to heavy maintenance costs.

A subgrade of D would be very weak, like uncompacted soil.

This may also be layers of waterproof fabric to prevent water penetrating to the subgrade.

Life in the subgrade can be substandard.

Construction would be to prepare the subgrade as it exists, and cover with a cold mix asphalt aggregate.

The remote locking mechanism is subgrade, considering the car's overall superlative quality.

The Task Force engineer had the entire site stripped, leaving the subgrade exposed.

Since the subgrade of Cannstatt station was raised, a new tunnel had to be built.

Poor drainage in the road bed is a frequent cause of this degradation of the base or subgrade.

The word was imported from French, where it means subgrade, the native material underneath a constructed pavement or railway.

This method is usually adopted in highways where marine clay is used as a subgrade soil.

The subgrade is the foundation of the pavement structure, on which the subbase is laid.

In temperate climates, potholes tend to form most often during spring (season) months when the subgrade is weak due to high moisture content.

You can lay it on the subgrade, propped to the approximate height with small stones; the concrete will then poured over and through the mesh.

Add an extra 5 to 10 percent to this amount to cover possible waste or spillage or variations in the thickness of the subgrade.

This step is important, because a poor subgrade will allow the concrete slab to settle unevenly, causing cracks or fissures.